Rituals are elaborate, sophisticated and codified instructions for producing set magical effects. Rituals vary in complexity, and require varying levels of thaumaturgical knowledge to complete successfully. They often require the trappings of Hermetic magic - circles drawn in chalk, locks of the victim's hair, meditation, chanting ancient words of power and the like. Rituals can take hours, days or even months to perform, but if successfully completed will always produce the same result. They can be incredibly powerful, particularly when senior thaumaturges join forces; it was a thaumaturgical ritual which cursed the entire Assamite clan.